Tool for joining metal-strap ends.



E. E. FLORA & J/P. MURPHY. TOOL FOR JOINING METAL STRAP ENDS.

APPLICATION FILED SEPT. 2, 1913. 1,105,191, Patented July 28,1914.

' f 2 SHEETS-SHEET 1.

E. E. FLORA & J. P. MURPHY. TOOL FOR JOINING METAL STRAP ENDS.

APPLICATION FILED SEPT. 2, 1913.

1, 1 O5, 1 9 l. Patented July 28, 1914,

/7 m /6 /7 /7 /if UNITED STATES PATENT OFFICE.

nLLswoRTH E. FLORA ANDJOHN F. MURPHY, or CHICAGO, ILLI OIS, ASSIGNORS TO THE SEAL & rAs'rENEa 00., or CHICAGO, ILLINOIS, A CORPORATION'OF DELAWARE.

'rooI. F013. J INING METALSTRAIP ENDS.

Patented J1 1 2s, 1914.

. Application filed September 2, 1913. Serial No. 787,710.

To all whom it may concern Be it known that we, ELLSWORTH E. FLORA and JOHN F." MURPHY, citizens of. the United States, residingat Chicago, in the county'of Cook and State of Illinois, have invented a new and useful Improvement in Tools for Joining MetalsStrap Ends, ofwhich the following is a specification.

This invention relates to an improved construction 'of tool for joining mutually-oven lapping metal straps or strips by crimping them edgewise into infolding contact, thereby locking the parts against relative movement. a

The method of forming the joint thus referred to is the subject of Letters Patent of the United States No. 1,038,108, granted September 10,1912; and the present tool is an improvement ,on the tool set forth in Letters Patent of the United States No. 1,038,109, also granted on that date.

In the accompanying drawings, Figure 1 shows the improved tool, with the jaws closed, by abroken view in front elevation; Fig. 2 is a broken face view, showing the head portion ofthe tool partly in section, and the jaws open; Fig. ,3 is a section on line 3-3, Fig. 1;,Fig. 4; is a broken and partly sectional enlarged view of the head-portion of the tool with the jaws openand the work in place between them, to be crimped'; Fig. 5 is a similar view showing the jaws closed upon the work to complete the joint; Fig. 6 is a plan View, partly sectional, showing the head with the'jaws in the condition represented in Fig. 5, and Figs. 7 and 8 are,

respectively, a back view and an edge view showlng strap-ends joined together by' the interlocking ,crimps produced by the tool.

\ The handles 9, 9, which may beof any desired length and hollow, as shown, terminate at their forward ends in corresponding segmental gears 10. These handles are pivotally supported through the gear-centers, to

house the gears in intermeshin relation be-' tween two similar met-a1v side-p ates 11, each formed with a forwardly-extending tongue 12, the plates being securely fastened together by a bolt 13 passing at their pointed rear ends through an interposed spacing- ,sleeve, as shown in Fig. 3. Between the tongues 12 are pivoted, on a bolt 14 passing through them near their forward ends, similar jaws 15, 15, formed with inwardly proectlng wedge-shaped lips 16 having curved edges (shown by dotted representation at 16 in Fig. 6) to adapt them to meet at their central portions when the jaws are closed.

The lip-carrying sections of the jaws are preferably formed separately and driven into place, thereby to render them removable when worn out and replaceable by others. From the center of the face of each jaw, beneath the lip, projects a crimpingpin 17 presenting, as its forward end, a

; short, rounded strap-edge engaging shoulder at the base of the beveled edge of the lip. Arms 18 on the jaws pivotally connect the latter through the medium of togglelinks 19 with the forward ends of the handles. A 'seat20 for the work isdepressed between its ends, from which extend rings.

21 about thecends of-the'jaw-pivoting bolt 1 14 to fasten the seat, which thus extends transversely across and bears against the ends of the plate-tongues 12, permanentlyin centralized position between the jaws beneath the lips. Stops 22 are shown projecting adjustably at the inner sides of the. handles to abut against each other and prevent further inward movement of the handles than is necessary to bring the lips into -meeting contact.

The tool is designed for use, more particularly, in joining together the overlapping ends of metal straps about baled cotton goods and other goods packed in bales. In that use, the strap-ends 23, in mutually overlapping relation, are introduced against the seat 20* to present their edges between the jaws and register them with the grooves shown to be formed between the beveled under surfaces of the lips and the crimping- *pins. By then pressing together'the hanthe jaws together, the intermeshing gears 10 serve to insure the accurately uniform movement of the jaws against the edges of the worln'thereby tooinsure maintaining the important central relation of the seat, and thus of the work,,to the opposing jaws. Con-' tinned pressure upon the handles bends and cups the straps between their edge-portions into the depressed central portion of the seat, so that in the final part of the jaw-action, which closes the lips 16 together, the

, pins 17 force the outwardly-curled edge-portions of the straps toward each other, as represented in Fig. 6, and the parts cooperate 1 to bulge the crimped strap-sections into the shape illustrated at 24; in Figs. 7 and 8, thereby firmly locking the straps one within the other.

Thecompound leverage afforded by the toggle-connections 19 between the handles and jaws renders the action of the tool very pivoted-together between the side plates and provided with lips, crimping-pins projecting from the inner jaw-faces, a stationary seat for the work provided with mar inal flanges embracing the tongue-sections 0 said and beneath the lips, handles pivoted between said plates, intermeshing gears on the forward ends of the handles and toggle links connecting the jaws with the handles. 2. A tool for joining metal strap-ends having opposite side plates provided with forwardly extending tongue-sections, jaws pivoted together between the side plates and provided with lips, crimping-pins projecting from the inner jaw-faces, a stationary seat for the work'provided with marginal flanges embracing the tongue-sections of said side plates and extending transversely across and connecting said plates between the jaws and beneath the lips, the marginal flanges of the seat forming-rings adapted to take over the ends of the jaw-arm pivoting bolt, handles pivoted between said plates intermeshing gears on the forward ends of the handles,

and toggl e-links connecting the jaws with the handles.

ELLSWORTH E. FLORA.- M JOHN F. MURPHY. In presence'of A. C. Freeman, 0. C. Avrsn 

